LG LRTPC1831W User Manual page 16

7-3 Failure diagnosis method of ice maker
Yes
ice-l:naldng tra y"""--._
the level with the_
Normal j
Defect of power terminal
• Check DC power (5V,12V)
Defect of ice-making sensor
• Check resistance values of
both ends of ice-making sensor
(Pin for PCB CON2 1,2 PIN)
• Ice-making sensor~Defect
between (PIN NO # 4 of IC1)
boards
Defect of ice*making kit
Resistance values at both
ends of ice-removing motor
(# 7,8 pin of PCB CON2 7,8)
is 18°-22_ ?
Drive circuit of ice-removing
motor (IC5 and auxiliary
circuit) is normal?
HALL IC~Defect between
(PIN NO # 20 of IC1) boards
Be sure ice-removing and
returning to the level when
pressing the TEST S/W
Defect of ice-making KIT TEST S/W
• Both ends of TEST S/W
(# 3,6 pin of PCB CON2 3,6)
are at open status?
• TEST S/W - Defect between
boards (PIN NO #19 of IC1)
Defect of water supply
• Water supply valve conduct
current?
• Water supply pump normally
operates?
• Water supply line is normally
connected?
_[ eplacement of
MAIN PCB
_l Replacement of
ice-making sensor
Replacement of
ice-making kit
Replacement of
MAIN PCB
Replacement of
ice-making kit
Replacement of
water supply valve
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